Bernina High Thread Tension Bobbin Case
This high thread tension bobbin case comes standard with the B 500 and B 700.
It will work in the following BERNINA machines:
- B700 E, B 735, B 740, B 770 QE, B 790, B 790 PLUS
- B 500 E, B 535, B 570 QE, B 590
- B 435, B 475 QE, B 480